arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2105.04576cond-mat.supr-con
收藏

自旋分裂超导体中的RKKY相互作用

RKKY interaction in a spin-split superconductor

Atousa Ghanbari, Jacob Linder

摘要:

本文从理论上确定了自旋分裂$s$波超导体中两个磁性杂质之间的相互作用。超导体中的自旋分裂在杂质自旋之间产生了两种不同的相互作用类型,这取决于它们的自旋是否位于垂直于自旋分裂场的平面(海森堡)或(伊辛)。对于超过$ξ_S$的杂质分离距离,我们发现,自旋分裂的大小可以确定是否反铁磁或铁磁排列的杂质自旋是优选的RKKY相互作用。此外,RKKY相互作用的伊辛项和海森堡项交替成为主导项,并且它们的幅度作为杂质之间的距离的函数振荡。

英文摘要:

We determine theoretically the interaction between two magnetic impurities embedded in a spin-split $s$-wave superconductor. The spin-splitting in the superconductor gives rise to two different interaction types between the impurity spins, depending on whether their spins lie in the plane perpendicular to the spin-splitting field (Heisenberg) or not (Ising). For impurity separation distances exceeding $ξ_S$, we find that the magnitude of the spin-splitting can determine whether an antiferromagnetic or ferromagnetic alignment of the impurity spins is preferred by the RKKY interaction. Moreover, the Ising and Heisenberg terms of the RKKY interaction alternate on being the dominant term and their magnitudes oscillate as a function of distance between the impurities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑